WO2012089033A1 - Procédé, système et appareil de transmission et d'acquisition pour message de préparation au rétablissement - Google Patents

Procédé, système et appareil de transmission et d'acquisition pour message de préparation au rétablissement Download PDF

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Publication number
WO2012089033A1
WO2012089033A1 PCT/CN2011/084046 CN2011084046W WO2012089033A1 WO 2012089033 A1 WO2012089033 A1 WO 2012089033A1 CN 2011084046 W CN2011084046 W CN 2011084046W WO 2012089033 A1 WO2012089033 A1 WO 2012089033A1
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WO
WIPO (PCT)
Prior art keywords
handover request
denb
cell
preparation information
rrc reconfiguration
Prior art date
Application number
PCT/CN2011/084046
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English (en)
Chinese (zh)
Inventor
杨义
焦斌
鲍炜
Original Assignee
大唐移动通信设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to US13/977,633 priority Critical patent/US9603067B2/en
Priority to EP11853270.4A priority patent/EP2661120B1/fr
Publication of WO2012089033A1 publication Critical patent/WO2012089033A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the priority of the Chinese Patent Application for Reconstruction of Information Transmission and Acquisition Methods, Systems and Apparatus is hereby incorporated by reference in its entirety.
  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and apparatus for transmitting and acquiring reconstruction preparation information.
  • Background Art In future mobile communication systems, such as B3G (Beyond Third Generation) systems or LTE-A
  • Figure 1 shows the network architecture of the LTE-A system after the RN is introduced.
  • the RN is connected to the De B (Door Evolved Node B) in a wireless manner, and the De B has a proxy function.
  • the RN accesses the core network through the donor cell under the DeNB, and has no direct wired interface with the core network.
  • Each RN can control one or more cells.
  • the interface between the UE (terminal) and the RN is called the Uu interface
  • the interface between the RN and the DeNB is called the Un interface.
  • X2 switching is divided into three phases: handover preparation, handover execution, and path conversion (that is, handover completion), as shown in Figure 2.
  • the handover preparation phase is initiated by the source e B (base station) and determines which target e B to switch to.
  • the handover request message carries the handover command message generated by the target eNB, and is forwarded by the source eNB to the UE, as shown in FIG.
  • the DeNB After receiving the Handover Request message, the DeNB reads the target cell identifier and forwards the handover request message to the corresponding target base station.
  • the source eNB selects the target cell, in order to improve the success probability of the UE re-establishing the other cell, in addition to preparing the RRC (Radio Resource Control) reconstruction preparation information of the target cell, other cells under the target eNB may be prepared.
  • RRC rebuild preparation information and put the prepared RRC reconfiguration preparation information
  • the RRC reconfiguration preparation information is placed in the Source To Target Container IE of the Handover Required message (source to target container cell) in.
  • the source eNB may prepare RRC reconfiguration preparation information of the cells under the plurality of target eNBs at the same time, and generate multiple Handover Requests, and send them to multiple Target e B.
  • the UE fails to cut into one eNB, then if it re-establishes to another eNB, if the eNB has received the Handover Request before, the reconstruction process may succeed.
  • parallel handover can improve the UE handover success probability.
  • the RRC reconfiguration preparation information of the cell mainly includes a key associated with the cell and an integrity check code.
  • the integrity check code corresponding to the cell is reported, and the target eNB compares the integrity check code reported by the UE with the saved one. If the UE is consistent, the UE may be allowed to be allowed. Access to the cell.
  • the source base station does not need to prepare the RRC reconfiguration preparation information of the own cell, and waits until the UE reestablishes its own cell, and then calculates an integrity check code to verify the UE.
  • the UE when the UE is handed over from the RN to the target eNB, if the UE fails to handover, it is highly probable that the cell of the DeNB to which the RN belongs is selected for reconstruction, or even the cells of other RNs under the DeNB are selected for reconstruction, but The DeNB does not have the RRC reconfiguration preparation information of the cell of the DeNB, and the other RNs in the DeNB do not have the RRC reconfiguration preparation information of the cell of the RN. Therefore, the UE selects the cell of the DeNB to which the RN belongs or the other RN of the DeNB. When the cell is reconstructed, the cell reconstruction will fail.
  • the cell of the DeNB or the cell of the RN under the DeNB is reconstructed, and the DeNB does not have the RRC reconfiguration preparation information of the cell managed by itself, and the other RNs under the DeNB do not have the RRC reconfiguration preparation information of the cell managed by the DeNB. failure.
  • the embodiments of the present invention provide a method and an apparatus for transmitting RRC reconfiguration preparation information, which are used to solve the problem of RRC reconfiguration preparation information of a cell managed by another RN under the DeNB and/or the DeNB in the prior art.
  • the embodiment of the invention provides a method, a system and a device for acquiring RRC reconfiguration preparation information, which are used to improve the probability that a terminal successfully performs cell reconstruction.
  • a method for acquiring RRC reconstruction preparation information includes:
  • the DeNB receives the handover request message
  • the DeNB parses the handover preparation information in the handover request message to obtain an RRC reconfiguration criterion of one or more cells. Preparation information
  • De B selects the RRC reconfiguration preparation information of the cell managed by the De B from the obtained RRC reconfiguration preparation information, and saves the selected RRC reconfiguration preparation information.
  • An RRC reconfiguration preparation information acquiring apparatus comprising:
  • a handover request receiving unit configured to receive a handover request message
  • a reconstruction information parsing unit configured to parse the handover preparation information in the handover request message, to obtain RRC reconfiguration preparation information of one or more cells;
  • a reconstruction information holding unit configured to select, according to the obtained RRC reconfiguration preparation information, RRC reconfiguration preparation information of the cell managed by the DeNB, and save the selected RRC reconfiguration preparation information.
  • a method for transmitting RRC reconfiguration preparation information comprising:
  • the relay node RN receives the cell measurement report reported by the terminal;
  • the RN sends a handover request message carrying the prepared RRC reconfiguration preparation information to the DeNB to which the RN belongs.
  • An RRC reconstruction preparation information transmitting apparatus comprising:
  • a measurement result receiving unit configured to receive a cell measurement report reported by the terminal
  • a reconstruction information preparation unit configured to determine, according to the received cell measurement report, a cell having a base station identifier of the local RN, and prepare RRC reconfiguration preparation information of the cell;
  • the handover request sending unit is configured to send, to the DeNB, a handover request message carrying the prepared RRC reconfiguration preparation information.
  • the RN after receiving the cell measurement report reported by the terminal, the RN determines the cell with the base station identity of the local RN according to the received cell measurement report, acquires the RRC reconfiguration preparation information of the cell, and then sends the RRC reconfiguration preparation information to the DeNB.
  • the prepared RRC reconfiguration preparation information switching request message Since the cell having the base station identifier of the RN is a DeNB to which the RN belongs and/or a cell managed by another RN under the DeNB, the RN can manage the DeNB and/or other RNs under the DeNB.
  • the RRC reconfiguration preparation information of the cell is sent to the DeNB.
  • a wireless communication system comprising:
  • a source e B configured to send a handover request message to the target DeNB
  • the target DeNB is configured to receive the handover request message, parse the handover preparation information in the handover request message, and obtain RRC reconfiguration preparation information of one or more cells, and select a cell managed by the DeNB from the obtained RRC reconfiguration preparation information.
  • the RRC rebuilds the preparation information and saves the selected RRC reconfiguration preparation information.
  • a wireless communication system comprising:
  • a source RN configured to receive a cell measurement report on the terminal, and determine a cell having the base station identity of the local RN according to the received cell measurement, and prepare radio resource control RRC reconfiguration preparation information of the cell; Attribution The DeNB sends a handover request message carrying the prepared RRC reconfiguration preparation information;
  • a DeNB configured to receive a handover request message, parse the handover preparation information in the handover request message, to obtain RRC reconfiguration preparation information of one or more cells, and select an RRC reestablishment of a cell managed by the DeNB from the obtained RRC reconfiguration preparation information. Prepare the information and save the selected RRC rebuild preparation information.
  • FIG. 1 is a schematic diagram of an E-UTRAN network architecture including a RN in the prior art
  • FIG. 2 is a schematic diagram of an X2 switching process in the prior art
  • FIG. 3 is a schematic diagram of an X2 handover preparation process in the prior art
  • FIG. 4 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of another method according to an embodiment of the present disclosure.
  • FIG. 6A is a schematic diagram of handover according to Embodiment 1 of the present invention.
  • FIG. 6B is a schematic diagram of handover according to Embodiment 2 of the present invention.
  • 6C is a schematic diagram of switching according to Embodiment 3 of the present invention.
  • 6D is a schematic diagram of handover according to Embodiment 4 of the present invention.
  • FIG. 7A is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 7B is a schematic structural diagram of another system according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of another device according to an embodiment of the present invention.
  • the embodiment of the present invention provides a method for transmitting and acquiring RRC reconfiguration preparation information.
  • the RN prepares the RRC reconfiguration preparation of the target cell in preparation for the RRC reconfiguration preparation information.
  • the information further prepares RRC reconfiguration preparation information of the DeNB to which the RN belongs and/or the cell of another RN managed by the DeNB, and transmits the prepared RRC reconfiguration preparation information to the DeNB by using a handover request message.
  • the DeNB needs to parse the handover preparation information in the handover request message, and save the obtained RRC reconfiguration preparation information of the cell managed by the DeNB.
  • the method is applicable to a wireless communication system such as LTE-A.
  • the RRC reconfiguration preparation information sending method provided by the embodiment of the present invention specifically includes the following steps: Step 40: The RN receives 4 cell measurements on the terminal.
  • Step 41 The RN determines, according to the received cell measurement report, a cell that has the identity of the base station of the local RN, and prepares RRC reconfiguration preparation information of the cell.
  • Step 42 The RN sends a handover request message carrying the prepared RRC reconfiguration preparation information to the DeNB to which the RN belongs.
  • the RN determines, according to the received cell measurement, the cell with the identity of the base station of the local RN, and the specific implementation may be as follows:
  • the RN determines, for each cell measurement result in the cell measurement, whether the first 20 bits of the cell identifier in the cell measurement result are the same as the base station identifier of the local RN, and when the determination is yes, the cell identifier is corresponding.
  • the cell is determined to be a cell having the identity of the base station of the own RN.
  • the target RN when receiving the handover request message carrying the target cell identifier and the RRC reconfiguration preparation information, the target RN does not consider the abnormal situation, but saves the RRC reconfiguration preparation information, and returns to the node that sends the handover request message.
  • the handover request acknowledgement message where the target cell identifier is not the identity of the cell managed by the RN, and the RRC reestablishment preparation information is the RRC reconfiguration preparation information of the cell managed by the RN.
  • the method for acquiring RRC reconfiguration preparation information specifically includes the following steps: Step 50: The DeNB receives a handover request message.
  • Step 51 The DeNB parses the handover preparation information in the handover request message to obtain RRC reconfiguration preparation information of one or more cells.
  • Step 52 The DeNB selects the RRC reconfiguration preparation information of the cell managed by the DeNB from the obtained RRC reconfiguration preparation information, and saves the selected RRC reconfiguration preparation information.
  • the DeNB may determine whether the obtained RRC reconfiguration preparation information includes the RRC reconfiguration preparation information of the cell managed by the RN under the local DeNB, and when the determination is YES. Sending the handover request message to the RN.
  • the DeNB may modify the target cell identifier carried in the handover request message to the identifier of the cell managed by the RN, or may not modify the identifier.
  • the DeNB After the DeNB receives the handover request message, if the DeNB is not the target node, the DeNB sends the handover request message to the target node, where the target node manages the cell corresponding to the target cell identifier carried in the handover request message. Node.
  • the DeNB may delete the information of the cell in the handover request message that is not related to the node that receives the handover request message, to save signaling transmission overhead.
  • the information of the cell includes RRC reconfiguration preparation information and the like.
  • the DeNB returns a handover request acknowledgement message to the source node, and specifically has the following three schemes: First, if the DeNB is a target node, the target node is configured to manage the target cell identifier carried in the handover request. After identifying the node of the corresponding cell, the DeNB # ⁇ performs admission control according to the handover request message, and sends a handover request acknowledgement message to the source node that sends the handover request message. If the RRC reconfiguration preparation information carried in the handover request message received by the DeNB includes the RRC reconfiguration preparation information of the cell that is not managed by itself, the RRC reconfiguration preparation information of the cells is not considered to be abnormal.
  • the source node here is the source e B or the source RN.
  • the DeNB forwards the handover request acknowledgement message to the source node that sends the handover request message after receiving the handover request acknowledgement message sent by the target node;
  • the DeNB After receiving the handover request acknowledgement message sent by all the specific RNs or some specific RNs, the DeNB selects a handover request acknowledgement message from the received handover request acknowledgement message, and forwards the handover to the source node that sends the handover request message. Requesting an acknowledgement message; the specific RN is an RN to which the DeNB sends the handover request; or
  • the DeNB forwards all received handover request acknowledgement messages to the source node that sent the handover request message.
  • the source node here is the source eNB or the source RN.
  • the DeNB forwards the handover request acknowledgement message to the source node that sends the handover request message;
  • the DeNB After receiving the handover request acknowledgement message sent by the target node and all or part of the specific RN, the DeNB selects a handover request acknowledgement message from the received handover request acknowledgement message, and forwards the message to the source node that sends the handover request message.
  • the handover request acknowledgement message; the specific RN is an RN to which the DeNB sends the handover request; or
  • the DeNB forwards all received handover request acknowledgement messages to the source node that sent the handover request message.
  • the source node here is the source RN.
  • the other base station After receiving the handover request message, the other base station does not consider an abnormal situation when the RRC reconfiguration preparation information carried in the handover request message includes the RRC reconfiguration preparation information that is not the cell managed by the base station, and may ignore these The RRC reconfiguration preparation information of the cell; and returning a handover request acknowledgement message to the DeNB.
  • the selection method may be: the DeNB selects the land used for acceptance in all the handover request acknowledgement messages received.
  • the radio access network radio access bearers the most number of handover request acknowledgement messages, or selects a handover request acknowledgement message returned by the least loaded RN.
  • the DeNB receives the uplink data and/or downlink data of the terminal forwarded by the source node, and saves the uplink data and/or the downlink data.
  • the DeNB may forward the downlink data and/or uplink data forwarded by the source node to the node that returns the handover request acknowledgement message. If the DeNB forwards all the received handover request acknowledgement messages to the source node, the DeNB forwards the source node. Downstream data and/or uplink data are forwarded to all nodes that return a handover request acknowledgement message.
  • the source RN When preparing the reconstruction information, the source RN prepares the DeNB and the cells of other RNs managed by the DeNB in addition to the cell of the target e B.
  • the DeNB forwards the handover request, it parses at least the reconstruction information of its own cell, and sends the handover request to the RN involved in the reconstruction information.
  • the source RN can distinguish which cells are the DeNB and the cells managed by other RNs according to the first 20 bits of the cell identifier reported by the UE.
  • the present invention is embodied as follows:
  • Embodiment 1 (X2 switching):
  • Figure 6A shows:
  • Step 1 The source eNB sends a Handover Request message to the target DeNB, where the RRC reconfiguration preparation information of the cell is carried.
  • the source eNB cannot distinguish between the RN cell and the DeNB cell. Therefore, when preparing the RRC reconfiguration preparation information, the RRC reconfiguration preparation information of some cells of the DeNB and/or the cells of some RNs of the DeNB may be prepared.
  • Step 2 After receiving the handover request message, the target DeNB sends a handover request message to the target RN according to the target cell identifier, as shown in the figure RN1.
  • the target DeNB also performs the following operations (the same applies when the target cell is a cell of the DeNB): After receiving the handover request message, the target DeNB resolves at least the handover preparation information (such as RRC Context IE). If there is RRC reconfiguration preparation information of the cell managed by itself, at least the RRC reconfiguration preparation information of the cell managed by itself is saved.
  • the handover preparation information such as RRC Context IE
  • the target DeNB also forwards the handover request information to the involved RN, such as RN2 in the figure.
  • the target DeNB forwards the handover request message to other nodes, as a signaling optimization, the information of the cell in the handover request message that is not related to the other node may be deleted, for example, the target DeNB sends a handover request message to the target RN1.
  • the RRC reconfiguration preparation information of the cell of the target DeNB and the cell of the RN 2 may be deleted.
  • the target cell identifier in the handover request message may not be changed, that is, the target cell in the handover request message is maintained as a certain cell of the RN1; or the target cell in the handover request message is changed.
  • the identifier is that the target cell identifier in the handover request message is modified to the identifier of a certain cell of the RN2.
  • Step 3 If the target cell in the handover request message received by the RN is not the cell managed by itself, but the RRC reconfiguration preparation information has information of its own cell; or, if the target cell in the handover request received by the RN is itself The managed cell, but the RRC reconfiguration preparation information has information about its own cell, and this is not considered to be an abnormal situation, and the RRC reconfiguration preparation information of these cells can be ignored.
  • a handover request acknowledgement message is returned to the DeNB.
  • the target DeNB may: (a) after receiving the handover request acknowledgement message returned by the target RN1, The source eNB may be sent to the source eNB. (b) After receiving the handover request acknowledgement message returned by some or all of the RNs, it is determined which handover request acknowledgement message is forwarded to the source eNB. The decision may be based on: the target DeNB determines, according to the handover request acknowledgement message, which RN accepts the largest number of E-RABs, or determines the lightest RN by the information exchanged by the X2 interface, so as to determine the handover request returned by the determined RN. The confirmation message is forwarded to source e B. It is also possible to: (c) serially send the received multiple handover request acknowledgement messages to the source eNB.
  • the target DeNB forwards only one handover request acknowledgement message to the source eNB, the target DeNB also forwards the downlink data and/or uplink data forwarded by the source eNB to the node that returns the handover request acknowledgement message. If the target DeNB forwards all the received handover request acknowledgement messages to the source eNB, the target DeNB forwards the downlink data and/or uplink data forwarded by the source eNB to all RNs that reply to the handover request acknowledgement message.
  • the DeNB stores the downlink data and/or the uplink data forwarded by the source eNB. In this way, once the UE handover fails to reestablish the cell to the DeNB, the loss of user data can be reduced.
  • Step 5 If the source eNB receives a handover request acknowledgement message, the handover command is sent to the UE. If the UE fails to switch to the target RN1 and chooses to reestablish to the RN2 or the DeNB, the RN2 or the DeNB initiates a path switch process to the core network after the reestablishment succeeds.
  • the source eNB decides which handover request acknowledgement message to send the handover command to the UE. After the UE handover succeeds, the target base station initiates a path conversion process to the core network.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • Step 1 When the source RN1 prepares the RRC reconfiguration preparation information, in addition to preparing the RRC reconfiguration preparation information of the cell of the target eNB, the RRC reconfiguration preparation information of the cell having the eNB ID of the own RN is prepared, and the RRC reconfiguration preparation information of the preparation is carried.
  • the handover request message is sent to the DeNB to which the RN belongs.
  • the RRC reconfiguration preparation information of the cell with the eNB ID of the RN is prepared by the source RN1, and can be determined according to the measurement report reported by the UE.
  • Step 2 After receiving the handover request message sent by the RN, the DeNB sends the handover request message to the target eNB (the eNB here may also be the RN under the DeNB).
  • the target eNB the eNB here may also be the RN under the DeNB.
  • the DeNB also performs the following operations (the same applies when the target cell is a cell of the DeNB or a cell of another RN under the DeNB):
  • the DeNB After receiving the handover request information sent by the RN, the DeNB analyzes at least the handover preparation information (such as the RRC Context IE), and if at least the RRC reconfiguration preparation information of the cell managed by the eNB, the RRC reconfiguration preparation information of the self-managed cell is saved. If there is RRC reconfiguration preparation information of the cell of another RN, the handover request message is forwarded to the involved RN, such as RN2 in the figure.
  • the handover preparation information such as the RRC Context IE
  • the DeNB forwards the handover request message to other nodes, as a signaling optimization, the information of the cell in the handover request message that is not related to the other node may be deleted.
  • the information of the cell in the handover request message that is not related to the other node may be deleted.
  • the RRC reconfiguration preparation information of the cell of the DeNB and the cell of the RN2 may be deleted.
  • the target cell identifier in the handover request message may not be changed, that is, the target cell in the handover request message is maintained as a certain cell of the target eNB; or the target in the handover request message is changed.
  • the cell identifier that is, the target cell identifier in the handover request message is modified to a certain cell identifier of the RN2.
  • Step 3 If the target cell in the handover request message received by RN2 is not the cell managed by itself, but
  • RRC reconfiguration preparation information has information about its own cell, it is not considered to be an abnormal situation.
  • a handover request confirmation message is returned to the DeNB.
  • Step 4 If the RRC reconfiguration preparation information in the handover request message received by the target eNB has information about the cell that is not its own, it is not considered to be an abnormal situation, and the RRC reconfiguration preparation information of these cells may be ignored. A handover request acknowledgement message is returned to the DeNB.
  • Steps 3 and 4 above are not strictly sequential in time.
  • Step 5 The DeNB may: (a) after receiving the handover request acknowledgement message returned by the target eNB, forwarding it to the source RN1; or: (b) receiving the handover request acknowledgement message returned by the target eNB and some or all of the RNs. After that, it is decided which handover request acknowledgement message is forwarded to the source RN1. The decision is based on the same procedure as in Step 1 of Example 1. It is also possible to: (c) serially send the received multiple handover request acknowledgement messages to the source RN1.
  • the DeNB forwards only one handover request acknowledgement message to the source RN1, that is, the above scenarios (a) and (b), it is a multi-cell preparation scenario.
  • the DeNB forwards the downlink data and/or uplink data forwarded by the source RN1 to the node that returns the handover request acknowledgement message. If the DeNB forwards all the received handover request acknowledgement messages to the source RN1, the DeNB forwards the downlink data and/or uplink data forwarded by the source RN1 to all nodes that reply to the handover request acknowledgement message (eg, RN2, target eB). .
  • the DeNB stores the downlink data and/or the uplink data forwarded by the source RN1. In this way, once the UE handover fails to select to reestablish the cell to the DeNB, the loss of user data can be reduced.
  • Step 6 If the source RN1 receives a handover request acknowledgement message, the handover command is sent to the UE. If the UE fails to handover to the target eNB and re-establishes to the RN2 or the DeNB, after the re-establishment is successful, the RN2 or the DeNB initiates a path switch process to the core network.
  • the source RN1 decides which handover request acknowledgement message the handover command is to be sent to the UE. After the UE handover succeeds, the target base station initiates a path conversion process to the core network.
  • Embodiment 3 (S1 switching):
  • Step 1 The source eNB sends a Handover Required message to the source MME, where the RRC reconfiguration preparation information of the cell is carried.
  • the source eNB cannot distinguish between the RN cell and the DeNB cell. Therefore, when preparing the RRC reconfiguration preparation information, the RRC reconfiguration preparation information of some cells of the DeNB and/or the cells of some RNs of the DeNB may be prepared.
  • Step 2 The source MME finds the target MME and sends a Forward Relocation Request message. The target MME determines the target DeNB to which a Handover Request message is sent.
  • Step 3 After receiving the handover request message, the target DeNB sends a handover request message to the target RN according to the target cell identifier, as shown in the figure RN 1.
  • the target DeNB also performs the following operations (the same applies when the target cell is a cell of the DeNB): After receiving the handover request message, the target DeNB resolves at least the handover preparation information (such as Source To Target Container IE). Element)] If there is RRC reconfiguration preparation information of the cell managed by itself, at least the RRC reconfiguration preparation information of the cell managed by itself is saved. If the source e B also prepares RRC reconfiguration preparation information of other RN cells, the target DeNB also forwards the handover request information to the involved RN, such as RN2 in the figure.
  • the target DeNB After receiving the handover request message, the target DeNB resolves at least the handover preparation information (such as Source To Target Container IE). Element)] If there is RRC reconfiguration preparation information of the cell managed by itself, at least the RRC reconfiguration preparation information of the cell managed by itself is saved. If the source e B also prepares RRC reconfiguration preparation information of other RN cells, the target DeNB also forwards the handover request information to
  • the target DeNB forwards the handover request message to other nodes, as a signaling optimization, the information of the cell in the handover request message that is not related to the other node may be deleted, for example, the target DeNB sends a handover request message to the target RN1.
  • the RRC reconfiguration preparation information of the cell of the target DeNB and the cell of the RN 2 may be deleted.
  • the target DeNB forwards the handover request message to the RN2, the target cell identifier in the handover request message may not be changed, that is, the target cell in the handover request message is maintained as a certain cell of the RN1; or the target in the handover request message is changed.
  • the cell identifier that is, the target cell identifier in the handover request message is modified to the identifier of a certain cell of the RN2.
  • Step 4 If the target cell in the handover request received by the RN is not the cell managed by itself, but the RRC reconfiguration preparation information has its own cell information; or, if the RN receives the handover request, the target cell is the cell managed by itself. However, if there is information about the cell that is not in the RRC reconfiguration preparation information, this is not considered to be an abnormal situation, and the RRC reconfiguration preparation information of these cells can be ignored. A handover request acknowledgement message is returned to the DeNB. (Same embodiment 1 step 3)
  • Step 5 The target DeNB may: (a) after receiving the handover request acknowledgement message returned by the target RN1, forwarding it to the target MME; or: (b) after receiving the handover request acknowledgement message returned by some or all of the RNs, Decide which handover request acknowledgement message to forward to the target MME.
  • the decision is based on the same procedure as in Step 1 of Example 1.
  • the downlink data and/or uplink data forwarded by the source eNB are saved. In this way, once the UE handover fails to reestablish the cell to the DeNB, the loss of user data can be reduced.
  • Step 6 If the source eNB receives a Handover Command message from the source MME, it sends a handover command to the UE. If the UE fails to handover to the target RN1 and re-establishes to the RN2 or DeNB, it is possible that the reconstruction is successful.
  • Embodiment 4 (S1 switching):
  • Step 1 When the source RN prepares the RRC reconfiguration preparation information, in addition to preparing the RRC reconfiguration preparation information of the cell of the target eNB, the RRC reconfiguration preparation information of the cell having the eNB ID of the local RN is also prepared, and the preparation for carrying is prepared.
  • the handover request message of the RRC reconfiguration preparation information is sent to the DeNB to which the RN belongs.
  • the RRC reconfiguration preparation information of the cell with the eNB ID of the RN prepared by the source RN may be determined according to the measurement report reported by the UE.
  • Step 2 After receiving the Handover Required sent by the RN, De B sends the handover request to the target MMEo.
  • the DeNB After receiving the handover request sent by the RN, the DeNB parses at least the handover preparation information (such as the Source To Target Container IE), and if at least the RRC reconfiguration preparation information of the self-managed cell, the eNB reserves the RRC reconfiguration preparation information of the management cell. .
  • the handover preparation information such as the Source To Target Container IE
  • the DeNB When the DeNB forwards the handover request, as a signaling optimization, the information of the cell in the handover request that is not related to the target node may be deleted. For example, the DeNB may delete the RRC reconstruction preparation information of the cell of the DeNB and the cells of other RNs.
  • Step 3 The source MME finds the target MME and sends a Forward Relocation Request message.
  • the target MME determines the target eNB to which a Handover Request message is sent. If there is information about the cell in the RRC reconfiguration preparation information received by the target eNB, it is not considered to be an abnormal situation, and the RRC reconfiguration preparation information of these cells may be ignored.
  • the target eNB returns a handover request acknowledgement message to the target MME, and the target MME returns a Forward Relocation Response message to the source MME, and the source MME sends a handover command message to the DeNB, and the DeNB forwards the handover command message to the RN.
  • Step 4 The RN sends a handover command to the UE, and the UE switches to the target e B. If the UE fails to handover and the DeNB is successfully reestablished, the DeNB initiates a path switch process to the core network, similar to completing an X2 handover.
  • an embodiment of the present invention further provides a wireless communication system, where the system includes:
  • a source e B70 configured to send a handover request message to the target DeNB
  • a target De B71 configured to receive the handover request message, parse the handover preparation information in the handover request message, and obtain RRC reconfiguration preparation information of one or more cells; and select, from the obtained RRC reconfiguration preparation information, the DeNB management The RRC reconfiguration preparation information of the cell is saved, and the selected RRC reconfiguration preparation information is saved.
  • the target De B71 is also used to:
  • the handover request message is transmitted to the RN.
  • the target De B71 is also used to:
  • the received uplink data and/or downlink data of the terminal forwarded by the source eNB are saved.
  • an embodiment of the present invention further provides a wireless communication system, where the system includes:
  • the source RN 72 is configured to receive a cell measurement report reported by the terminal, and determine, according to the received cell measurement report, that a cell identified by the base station of the RN, and preparing RRC reconfiguration preparation information of the cell; and transmitting, to the DeNB to which the RN belongs, a handover request message carrying the prepared RRC reconfiguration preparation information;
  • De B73 configured to receive a handover request message, parse handover preparation information in the handover request message, to obtain RRC reconfiguration preparation information of one or more cells, and select an RRC of a cell managed by the DeNB from the obtained RRC reconfiguration preparation information. The preparation information is reconstructed, and the selected RRC reconstruction preparation information is saved.
  • the DeNB is also used to:
  • the handover request is performed. A message is sent to the RN.
  • the DeNB is also used to:
  • the received uplink data and/or downlink data of the terminal forwarded by the source RN are saved.
  • an embodiment of the present invention further provides an RRC reconfiguration preparation information sending apparatus, which may be applied to the above wireless communication system, where the apparatus includes:
  • the measurement result receiving unit 80 is configured to receive a cell measurement report reported by the terminal;
  • a reconstruction information preparation unit 81 configured to determine, according to the received cell measurement report, a cell with a base station identifier of the local RN, and prepare RRC reconfiguration preparation information of the cell;
  • the handover request sending unit 82 is configured to send, to the DeNB, a handover request message carrying the prepared RRC reconfiguration preparation information.
  • the reconstruction information preparation unit 81 is configured to:
  • the device further includes:
  • the reestablishment information holding unit 83 is configured to receive a handover request message carrying the target cell identifier and the RRC reconfiguration preparation information, where the target cell identifier is not the identifier of the cell managed by the local RN, and the RRC reconfiguration preparation information is the RRC of the cell managed by the RN. Reestablishing preparation information; saving the RRC reconfiguration preparation information, and returning a handover request acknowledgement message to the node that sent the handover request message.
  • the RRC reconfiguration preparation information sending apparatus provided by the embodiment of the present invention may be specifically an RN.
  • an apparatus for acquiring RRC reconfiguration preparation information may be applied to the foregoing wireless communication system, where the apparatus includes:
  • the handover request receiving unit 90 is configured to receive a handover request message.
  • the reconstruction information parsing unit 91 is configured to parse the radio resource control handover preparation information in the handover request message, to obtain RRC reconfiguration preparation information of one or more cells;
  • the reconstruction information holding unit 92 is configured to select a cell managed by the DeNB from the obtained RRC reconfiguration preparation information.
  • the RRC rebuilds the preparation information and saves the selected RRC reconfiguration preparation information.
  • the device also includes:
  • the re-establishment information forwarding unit 93 is configured to determine whether the obtained RRC reconfiguration preparation information includes the RRC reconfiguration preparation information of the RN-managed cell in the De B, and if the determination is yes, send the handover request message to the
  • the device also includes:
  • the handover request forwarding unit 94 is configured to: when the local DeNB is not the target node, send the handover request message to the target node, where the target node is a node that manages a cell corresponding to the target cell identifier carried in the handover request message. Also includes:
  • the handover request optimization unit 95 is configured to delete information of a cell in the handover request message that is not related to the node that receives the handover request message, before sending the handover request message.
  • the information of the cell includes: RRC reconfiguration preparation information.
  • the device also includes:
  • the target identifier modification unit 96 is configured to modify the target cell identifier carried in the handover request message to the identifier of the cell managed by the RN, before sending the handover request message.
  • the device also includes:
  • a first handover confirmation unit 97 configured to: when the local DeNB is a target node, where the target node is a node that manages a cell corresponding to the target cell identifier carried in the handover request, the handover request message is subjected to admission control, and The source node that sent the handover request message sends a handover request acknowledgement message.
  • the device also includes:
  • the second handover confirming unit 98 is configured to: after the target node is an RN under the local DeNB, after receiving the handover request acknowledgement message sent by the target node, forwarding the handover request to the source node that sends the handover request message Confirmation message; or,
  • the specific RN After receiving the handover request acknowledgement message sent by all the specific RNs or part of the specific RNs, selecting a handover request acknowledgement message from the received handover request acknowledgement message, and forwarding the handover request to the source node that sends the handover request message a confirmation message;
  • the specific RN is an RN to which the DeNB sends the handover request; or, to the source node that sends the handover request message, forwards all received handover request acknowledgement messages.
  • the device also includes:
  • the third handover confirming unit 99 is configured to: after the target node is another base station, after receiving the handover request acknowledgement message sent by the target node, forwarding the handover request acknowledgement message to the source node that sends the handover request message; Or, after receiving the handover request acknowledgement message sent by the target node and all or part of the specific RN, selecting a handover request acknowledgement message from the received handover request acknowledgement message, and sending the handover request message to the source node Forwarding the handover request acknowledgement message; the specific RN is an RN to which the DeNB sends the handover request; or All the received handover request acknowledgement messages are forwarded to the source node that sent the handover request message.
  • the device further includes:
  • the data saving unit 100 is configured to save the received uplink data and/or downlink data from the terminal of the source node that sends the handover request message.
  • the RRC reconfiguration preparation information acquiring apparatus may specifically be De B.
  • the beneficial effects of the present invention include:
  • the RN when preparing the RRC reconfiguration preparation information, the RN prepares the RRC of the target eNB, and further prepares the RRC of the RN to which the RN belongs and/or the RRC of the cell of the other RN managed by the De B.
  • the preparation information is reconstructed, and the prepared RRC reconfiguration preparation information is transmitted to the DeNB through the handover request message.
  • the DeNB After receiving the handover request message, the DeNB needs to parse the handover preparation information in the handover request message, and save the obtained RRC reconfiguration preparation information of the cell managed by the DeNB.
  • the DeNB stores the RRC reconfiguration preparation information of the cell managed by the DeNB, thereby greatly improving the probability of successful cell reconstruction managed by the terminal and the DeNB, and reducing the probability of successful cell reconstruction. Switching failure probability, reducing the probability of dropped calls, and improving the user experience.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé, un système et un appareil de transmission et d'acquisition pour message de préparation au rétablissement de contrôle de ressources radio (RRC), ayant trait au domaine technique de la communication et utilisés pour l'amélioration du taux de succès de rétablissement de cellules pour terminaux. Selon la présente invention, lorsqu'un nœud relais prépare un message de préparation au rétablissement de contrôle RRC, outre la préparation du message de préparation au rétablissement de contrôle RRC pour une cellule cible, le nœud RN prépare également un message de préparation au rétablissement de contrôle RRC pour un nœud B évolué donneur (DeNB) appartenant au nœud RN et/ou aux cellules d'autres nœuds RN gérés par le nœud DeNB, et transmet les messages de préparation au rétablissement de contrôle RRC au nœud DeNB sur un message de demande de transfert intercellulaire. Suite à la réception du message de demande de transfert intercellulaire, le nœud DeNB doit analyser l'information de préparation de transfert intercellulaire dans le message de demande de transfert intercellulaire de la cellule, et stocker l'information de message de préparation au rétablissement de contrôle RRC obtenue de la cellule gérée par le nœud DeNB. L'utilisation du schéma technique peut améliorer nettement le taux de succès de rétablissement entre le terminal et la cellule gérée par le nœud DeNB.
PCT/CN2011/084046 2010-12-31 2011-12-15 Procédé, système et appareil de transmission et d'acquisition pour message de préparation au rétablissement WO2012089033A1 (fr)

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US13/977,633 US9603067B2 (en) 2010-12-31 2011-12-15 Sending and acquiring method, system and apparatus for reestablishment preparation message
EP11853270.4A EP2661120B1 (fr) 2010-12-31 2011-12-15 Procédé et appareil d'acquisition d'information de rétablissement d'un message de demande de transfert

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150215838A1 (en) * 2012-09-12 2015-07-30 Nokia Corporation Method and apparatus for mobility control in heterogenous network

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102448131B (zh) * 2010-09-30 2015-04-29 华为技术有限公司 消息处理方法、装置及系统
CN102104906B (zh) 2010-12-31 2015-02-18 大唐移动通信设备有限公司 重建准备信息发送及获取方法、系统和装置
CN103124418A (zh) * 2011-11-18 2013-05-29 华为技术有限公司 上行数据转发方法以及装置
WO2014209194A1 (fr) * 2013-06-28 2014-12-31 Telefonaktiebolaget L M Ericsson (Publ) Procédés et nœuds de réseau pour mobilité améliorée entre réseaux mobiles de communication
US20150172988A1 (en) * 2013-12-18 2015-06-18 Telefonaktiebolaget L M Erisson (Publ) Reduced wireless communication handover command size during handover execution
US20170019945A1 (en) * 2014-03-21 2017-01-19 Nokia Solutions And Networks Oy Dual Connectivity Re-Establishment
CN108024385B (zh) * 2016-11-04 2022-04-26 华为技术有限公司 随机接入的方法、网络设备和用户设备
CN111052803B (zh) * 2017-09-05 2022-05-31 英国电讯有限公司 蜂窝电信网络中的方法、网络节点和计算机可读数据载体
CN108235348B (zh) * 2017-12-29 2021-06-22 Oppo广东移动通信有限公司 检测方法、装置及计算机存储介质
CN110636561B (zh) * 2018-06-21 2022-11-08 中兴通讯股份有限公司 信息传输方法及装置、存储介质、电子装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101374324A (zh) * 2007-08-23 2009-02-25 大唐移动通信设备有限公司 一种移动终端实现小区切换的方法、系统及节点设备
CN101505514A (zh) * 2008-02-04 2009-08-12 华为技术有限公司 切换失败的处理方法、检测切换成功的方法和装置
CN101646212A (zh) * 2008-08-06 2010-02-10 大唐移动通信设备有限公司 小区切换控制方法、装置和通信系统
CN102104906A (zh) * 2010-12-31 2011-06-22 大唐移动通信设备有限公司 重建准备信息发送及获取方法、系统和装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070149196A1 (en) * 2005-12-08 2007-06-28 Samsung Electronics Co., Ltd. Handover reestablishment method of communication system
CN101622903A (zh) * 2007-01-29 2010-01-06 诺基亚公司 提供传统和其他无线网络子系统之间互操作性的设备、方法和计算机程序产品
WO2010093172A2 (fr) * 2009-02-13 2010-08-19 Samsung Electronics Co., Ltd. Procédé et appareil de transfert dans un système de communication sans fil comprenant des femtocellules
WO2011002244A2 (fr) * 2009-07-02 2011-01-06 Lg Electronics Inc. Procédé pour faciliter le transfert intercellulaire d'équipements utilisateurs (eu) dans un système de communication de paquets de données
US8712430B2 (en) * 2009-09-24 2014-04-29 Futurewei Technologies, Inc. System and method for deriving cell global identity information
US8687590B2 (en) * 2009-10-02 2014-04-01 Blackberry Limited System and method for handover between relays
US8406192B2 (en) * 2009-10-02 2013-03-26 Research In Motion Limited Handover mechanisms with synchronous PDCP protocol under various relay architectures
US9516559B2 (en) * 2010-01-20 2016-12-06 Blackberry Limited Methods of performing cell change without receiving description of resources in a target cell
US20110261747A1 (en) * 2010-04-02 2011-10-27 Interdigital Patent Holdings, Inc. Method and apparatus for supporting communication via a relay node
US8874117B2 (en) * 2010-05-04 2014-10-28 Motorola Mobility Llc Handover during carrier aggregation operation in wireless communication network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101374324A (zh) * 2007-08-23 2009-02-25 大唐移动通信设备有限公司 一种移动终端实现小区切换的方法、系统及节点设备
CN101505514A (zh) * 2008-02-04 2009-08-12 华为技术有限公司 切换失败的处理方法、检测切换成功的方法和装置
CN101646212A (zh) * 2008-08-06 2010-02-10 大唐移动通信设备有限公司 小区切换控制方法、装置和通信系统
CN102104906A (zh) * 2010-12-31 2011-06-22 大唐移动通信设备有限公司 重建准备信息发送及获取方法、系统和装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150215838A1 (en) * 2012-09-12 2015-07-30 Nokia Corporation Method and apparatus for mobility control in heterogenous network

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CN102104906A (zh) 2011-06-22
EP2661120A1 (fr) 2013-11-06
CN102104906B (zh) 2015-02-18

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